My new x670e and those 4x64GB sticks have finally arrived. However, I only remembered to buy a new PSU today, so it’ll take me until next week to set everything up.
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Updated the BIOS, saw the AEMP option, enabled it, waited 10 min for training, managed to boot at 5200MHz with a single click.
Not sure if this is stable, but if so I’ll be extremely happy.
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ASUS has added CT64G56C46U5.M16B1 on the QVL list for the ProArt X870E
2 sticks at 5600
4 sticks at 3600
Can you boot MemTest and run a full test and post results at 5200 speed with these Kingston sticks?
Time for video testing the 256GM RAM on X870E and what stable speed is possible.
good idea, will try it out. Will also give ycruncher on a live image sometime after that.
Yes I think AMD stated somewhere it would only be for 9000 serires. This looks like only 2 dims not 4 as well.
They’re CUDIMMs. There’s special circuitry on them which is incompatible with the 7000s, they won’t even POST with these modules installed. 9000s are able to turn off the special circuitry, letting them post but at lower speeds than the modules theoretically support.
The Crucial are just regular.
https://www.bhphotovideo.com/c/product/1875706-REG/crucial_cp2k64g56c46u5_128gb_ddr5_5600_mhz.html
I have 192GB kit, works flawlessly at 5200 with 7950X, but only works at 4800 with 9950X, AMD knows this and its super strange as it uses the same memory controller.
Can you try 4800?
I’ll try bumping up some voltages with 5200MHz first, then I can try to clock down to 4800MHz.
1.3V still error’ed out, but it seems like I did not set all the proper voltages (only did VDD and VDDQ).
Gonna dump some extra information here from my tests so far:
AEMP auto did 5200 42-42-42 @1.25V, seems similar to the config for crucial’s 64GB UDIMMs 5600MHz with their 5200 XMP config.
I’m then tested out 5200 46-45-45 (same timings for the above stick at 5600MHz), using VDDSOC=1.2V, and VDDIO=VDD=VDDQ=1.3V.
The above ended up with some errors on memtest, so I dialed the frequency down to 4800 without changing anything else, and it did manage to pass:
The system is currently just sitting on top of the mobo’s box, with a cheapo, small air cooler just sitting on top of the CPU and not bolted down, so I’ll leave memtest running until later tonight, and find some time to properly mount the PA120 on it, get some linux live image going and try ycruncher to double check that this config is stable.
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With 4 sticks and high density RAM, you need to keep the RAM sticks under 65° C. preferably 60. You might need to put a fan on the RAM to keep the errors down. Or just have good and adequate airflow in whatever case you put the motherboard in.
Install the spd5118 kernel module driver to check the memory sticks temperature reported by each sticks SPD chip.
sudo modprobe spd5118
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Thanks for all the feedback and information and testing you guys put in this thread, these are really valuable details. I’m preparing for a build with the Ryzen 9900X / Asus ProArt B650 as described here 128GB and 192GB ECC RAM with Asus ProArt B650 motherboard and I’m hoping that 192GB and eventually 256GB ECC configurations might work there as well, not sure if there’s any consensus on that yet for this hardware config. Personally I don’t care about the memory speeds, my AM4 system ran just fine at 2133MHz so even if it’s limited to 3600MHz for these capacities on AM5 it wouldn’t make much difference I think
So Jut as I suspected 4800 is the limit, just as 192GB
what about intel boards? is it possible to use CUDIMM at z790?
For some reason Asus has removed 256GB from the ProArt Z790. They had CUDIMM 64GB chips on the support list but has been removed.
I have not checked other motherboards.
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hynix memory chips
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Nice, shame those aren’t CUDIMMs though… sooner Zen 6 gets here the sooner CUDIMMs will go mainstream, with any luck. One can hope.